LX6431_05 Datasheet, PDF (1/11 Pages) Microsemi Corporation – PRECISION PROGRAMMABLE REFERENCES

THE INFINITE POWER OF INNOVATION
LX6431 / 6431A / 6431B
PRECISION PROGRAMMABLE REFERENCES
PRODUCTION DATA SHEET
DESCRIPTION
The LX6431 series precision adjustable three
terminal shunt voltage regulators are pin-to-pin
compatible with the industry standard TL431, but
with significant improvements. The LX6431
design has eliminated regions of instability
common to older generation shunt regulator
products like the TL431. Designs are made simpler
by eliminating the task of insuring capacitive loads,
and output voltage and cathode currents don’t
combine for unstable operation. The capacitor
value is chose simply to give the best load transient
response without the possibility of instability. A
lower reference input current allows the use of
higher value reference divider resistors, reducing
the current drain from batteries in portable
equipment as well as reducing the voltage
programming errors due to the impedance of the
divider network (See product Highlight)
In addition, the LX6431B has an improved
initial accuracy of 0.4%, and the output voltage is
programmable by using two external resistors
from 2.5V to 36V.
These devices offer low output impedance for
improved load regulation. The typical output
impedance of these devices is 100mΩ. The
reduced reference input bias current and minimum
operating currents make these devices suitable for
portable and micro power applications.
KEY FEATURES
„ Unconditionally Stable for All
Cathode To Anode Capacitance
Values
„ Reduced Reference Input
Current Allowing The Use of
Higher Value Divider Resistors
(0.5µA)
„ Initial Voltage Reference
Accuracy of 0.4% (LX6431B)
„ Sink Current Capability 0.6mA to
100mA
„ Typical Output Dynamic
Impedance Less Than 100mΩ
„ Adjustable Output Voltage From
2.5V to 36V
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
Output Voltage Error Due to I_REF
PACKAGE ORDER INFO
T_A (°C)
Initial
Tolerance
PK
Plastic TO-89
3-Pin
RoHS Compliant / Pb-free
Transition D/C: 0518
Plastic SOIC
DM _8-Pin
RoHS Compliant / Pb-free
Transition D/C: 0440
2%
LX6431CPK
LX6431CDM
0 to 70
1%
LX6431ACPK
LX6431ACDM
0.4%
LX6431BCPK
LX6431BCDM
2%
LX6431IPK
LX6431IDM
-40 to 85 1%
LX6431AIPK
LX6431AIDM
0.4%
LX6431BIPK
LX6431BIDM
Plastic TO-92
LP _3-Pin
RoHS Compliant / Pb-free
Transition D/C: 0509
LX6431CLP
LX6431ACLP
LX6431BCLP
LX6431ILP
LX6431AILP
LX6431BILP
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX6431CDM-TR)
Copyright © 1999
Rev. 1.4a,2005-04-04
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]
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